Sprites [1]} contains sequences of animated cartoon characters with 15 action categories.
The appearances of characters are fully controlled by four attributes, i.e., body, top, bottom, and hair.
We construct two domains, \(\mathbf {P}_1\)  and \(\mathbf {P}_2\) .
\(\mathbf {P}_1\)  uses the human body with attributes randomly selected from 3 tops, 4 bottoms, and 5 hairs, while \(\mathbf {P}_2\)  uses the alien body with attributes randomly selected from 4 tops, 3 bottoms, and 5 hairs.
The attribute pools are non-overlapping across domains, resulting in completely heterogeneous \(\mathbf {P}_1\)  and \(\mathbf {P}_2\) . Each domain has 900 video sequences and each sequence contains 8 frames.
